Scientists thought the solar system's planets all had the moons they were going to have — but Peggy challenges that very notion. Peggy appears to be a new moon for Saturn, emerging from the rocky debris that makes up the planet's famous rings.

Meet Biden, a new dwarf planet named after the vice president that's upsetting the apple cart that is our understanding of the solar system. It, along with a relatively nearby neighbor, Sedna, are challenging astronomers to rewrite definitions of how the solar system formed.

Russians and Americans live and work together for six months at a time on the International Space Station. Given that tensions between Moscow and Washington are way up after Russia's annexation of Crimea, we wondered how the conversation is going way up there.

The European Space Agency's Gaia mission is headed into space. The $1 billion space observatory blasted off from French Guiana Thursday morning on a mission to create a very detailed, 3-D map of the Milky Way. No special glasses required.

China on Saturday joined the US and the former Soviet Union as the only nations to stick a moon landing. The Chang'e 3 lander and its Jade Rabbit rover will now spend months exploring the moon's surface.

Obama's health care turkey requires some heavy lifting this season. We look at immigrants, both those puzzling over US traditions and one just passing through from the Oort Cloud. And North Koreans may have a new export for the US, albeit an illegal one. All that and more, in today's Global Scan.

Data from NASA's Kepler spacecraft points to potentially over 10 billion earth-like planets elsewhere in our galaxy. With more earth-like planets, there's more potential for earth-like life. But if we make contact with extraterrestrials, who gets to say hello? And how?

Data from NASA's Kepler spacecraft points to potentially over 10 billion earth-like planets elsewhere in our galaxy. With more earth-like planets, there's more potential for earth-like life. But if we make contact with extraterrestrials, who gets to say hello? And how?

Canadian Astronaut Chris Hadfield will be returning to earth Tuesday after five months of commanding the International Space Station. Marco Werman speaks with his unofficial social media manager and his son, Evan Hadfield.

Today in Moscow six astronauts were shut up in a capsule that will remain closed for 100 days. It's part of an experiment to find out how they might cope on the journey to and from the planet Mars. Anchor Lisa Mullins finds out more from New York Times reporter, Michael Schwirtz.

Iran announced today that it has launched a research rocket into space. The rocket is carrying a mouse, two turtles, and about a dozen worms. John Pike is Director of GlobalSecurity.org. That's a defense information website based in Alexandria, Virginia.

Scientists thought the solar system's planets all had the moons they were going to have — but Peggy challenges that very notion. Peggy appears to be a new moon for Saturn, emerging from the rocky debris that makes up the planet's famous rings.

Meet Biden, a new dwarf planet named after the vice president that's upsetting the apple cart that is our understanding of the solar system. It, along with a relatively nearby neighbor, Sedna, are challenging astronomers to rewrite definitions of how the solar system formed.

Data from NASA's Kepler spacecraft points to potentially over 10 billion earth-like planets elsewhere in our galaxy. With more earth-like planets, there's more potential for earth-like life. But if we make contact with extraterrestrials, who gets to say hello? And how?

NASA's researchers are frequently taking pictures that are hard to believe — or that look familiar, but turn out to be not at all what we expected. This picture comes from a place not too distant, at least for NASA.

The European Space Agency's Gaia mission is headed into space. The $1 billion space observatory blasted off from French Guiana Thursday morning on a mission to create a very detailed, 3-D map of the Milky Way. No special glasses required.

Russians and Americans live and work together for six months at a time on the International Space Station. Given that tensions between Moscow and Washington are way up after Russia's annexation of Crimea, we wondered how the conversation is going way up there.